import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login'
import Home from '../components/Home'
import Welcome from '../components/Welcome'
import Users from '../components/user/Users'
import Rights from '../components/power/Rights'
import Roles from '../components/power/Roles'
import Cate from '../components/goods/Cate'
import Params from '../components/goods/Params'
import GoodsList from '../components/goods/List'
import Add from '../components/goods/Add'
import Order from '../components/order/Order'
import Report from '../components/report/Report'
Vue.use(VueRouter)

const router = new VueRouter({
  routes: [
    //重定向
    { path: '/', redirect: '/login' },
    { path: '/login', component: Login },
    {
      path: '/home', component: Home,
      redirect: '/welcome',
      children: [
        { path: '/welcome', component: Welcome },
        { path: '/users', component: Users },
        { path: '/rights', component: Rights },
        { path: '/roles', component: Roles },
        { path: '/categories', component: Cate },
        { path: '/params', component: Params },
        { path: '/goods', component: GoodsList },
        { path: '/gooods/add', component: Add },
        { path: '/orders', component: Order },
        { path: '/reports', component: Report }]
    }
  ]
})
//挂载路由导航守卫
router.beforeEach((to, from, next) => {
  //to  将要访问的路径
  //from  从那个路径跳转而来
  //next  是一个函数表示放行
  //next() 放行   next('/login')  强制跳转

  //如果访问的路径是login直接放行
  if (to.path === '/login') return next()
  //如果不是登录页面  判断时候包含token
  const tokenstr = window.sessionStorage.getItem('token')
  //token 不存在跳转登录页面
  if (!tokenstr) return next('/login')
  //存在直接放行
  next()
})
// 解决element-ui   导航栏中的vue-router  在3.0版本以上重复点菜单报错问题
const originalPush = VueRouter.prototype.push
VueRouter.prototype.push = function push(location) {
  return originalPush.call(this, location).catch(err => err)
}

export default router



